The same question!
The code below is working, but it shows not the most used tags. I’ve just checked it. It doesn’t show the real most used tags.
<ul id="footer-tags"> <?php global $wpdb; $term_ids = $wpdb->get_col(" SELECT DISTINCT term_taxonomy_id FROM $wpdb->term_relationships INNER JOIN $wpdb->posts ON $wpdb->posts.ID = object_id WHERE DATE_SUB(CURDATE(), INTERVAL 90 DAY) <= $wpdb->posts.post_date"); if($term_ids > 0){ $tags = get_tags(array( 'orderby' => 'count', 'order' => 'DESC', 'number' => 5, 'include' => $term_ids, )); foreach ( (array) $tags as $tag ) { echo '<li><a href="' . get_tag_link ($tag->term_id) . '" rel="tag">' . $tag->name . '</a></li>'; } } ?> </ul>